Calculus Examples

$\int \frac{1}{1 + \cos (x)} d x$

$\int \frac{1}{1 + \cos (x)} d x$ is an antiderivative of $\frac{1}{1 + \cos (x)}$ , so by definition $\frac{d}{d x} [\int \frac{1}{1 + \cos (x)} d x]$ is $\frac{1}{1 + \cos (x)}$ .

$\frac{1}{1 + \cos (x)}$